im wanting to replace my ashley exhaust system with a standard 16v one as its soooo loud!!! at the moment its a 4 branch which is staying, then the long pipe, which is standard cause i had to have it replaced casue it was blowing, and then the two boxes at the back, ive just got hold of a tidy standard rear box, do i need the box behind that or should i have a pipe not a box inbetween? im lost.... either way i need to replace it with something cause the bores too big